Finding the Third Proportional to 42,080 and 70,136

Step by Step Solution

1. Step 1: Write the proportion equation
   42,080 : 70,136 = 70,136 : x
2. Step 2: Convert to fraction form
   42,080/70,136 = 70,136/x
3. Step 3: Cross multiply
   42,080x = 70,136 × 70,136
4. Step 4: Simplify right side
   42,080x = 4,919,058,496
5. Step 5: Solve for x
   x = 4,919,058,496/42,080
6. Step 6: Final answer
   x = 116,897.78